Tool to automate Docker Swarm

Question

I have followed the Docker Docs about setting up Swarm on Virtualbox. I suppose it is the same procedure to set it up on AWS, Azure or DigitalOcean. It is a lot to do manually every time .

Is there a tool to automate this?

I would like to use something to set up and scale Swarm like Compose does for Docker .

Maybe I would start with one AWS instance and 2-3 containers and then scale them up to 100 containers and the instances to scale accordingly. Then I would want to scale down to 2 instances and the rest would shut down.

Does something like this exist ?

Answer 1

If you want to avoid manual configurations but still get the required high availability and cost efficiency, try to run Docker Swarm template pre-packaged by Jelastic:

• it has built-in automatic clustering and scaling
• the installation is performed automatically and you'll get full access to the cluster via intuitive UI
• containers are running directly on bare metal, so no need to reserve full VMs for each service (and you can choose the datacenter you want to run your project on)
• the payment is done based on actual consumption of RAM and CPU
• containers are automatically distributed across different hardware servers that increases high availability

The details about the package and installation steps are in this article .

Answer 2

You can use Docker Machine for provisioning hosts and configuring swarm easily ( example ).

The Docker Ecosystem includes also managed solutions like Tutum or Docker Cloud to achieve easily what you want.

Answer 3

You can use Ansible for configuring the Swarm master, Swarm nodes, and all the required cluster discovery. Ansible is a general IT automation tool, but it comes with a very powerful Docker module that allows to set up Docker Swarm easily.

This GitHub repository shows a good example how to set up Swarm with Ansible.

Answer 4

查看devopsbyte.com博客，其中介绍了如何使用ansible设置docker swarm 集群